terrified of 2 mo old getting influenza

My baby is a little over 2 months old, and I am terrified of her getting the flu. I also have a 4 year old who I pray doesn't get it either, but my 2 month old immune system isn't as strong. I have post partum anxiety and am on Zoloft to help, so having hee slap dab in the middle of flu season is nail bitting. 36 people included 2 children have died in my state due to the flu. the only place I have taken my daughter is to the doctor office for her vacinnations and to my mother's house. myself, husband, and son all got the flu shot in hopes we don't get it but if we do hopefully it won't be as bad. I do exclusively breast feed so I am hoping that provides her with some protection. anyone else worried about this like me? Or is my anxiety talking here?